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<!--
Copyright (c) 2019 The Khronos Group Inc.
Use of this source code is governed by an MIT-style license that can be
found in the LICENSE.txt file.
-->
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<link rel="stylesheet" href="../../resources/js-test-style.css"/>
<script src="../../js/js-test-pre.js"></script>
<script src="../../js/webgl-test-utils.js"></script>
</head>
<body>
<div id="description"></div>
<div id="console"></div>
<script>
"use strict";
description('Tests that index validation for drawElements works with large attribute buffers');
var wtu = WebGLTestUtils;
var context = wtu.create3DContext();
var program = wtu.loadStandardProgram(context);
context.useProgram(program);
// Create a small index buffer.
var indexObject = context.createBuffer();
context.bindBuffer(context.ELEMENT_ARRAY_BUFFER, indexObject);
var indexArray = new Uint16Array([0, 1, 2]);
context.bufferData(context.ELEMENT_ARRAY_BUFFER, indexArray, context.STATIC_DRAW);
// Create a large attribute buffer.
var vertexObject = context.createBuffer();
context.enableVertexAttribArray(0);
context.bindBuffer(context.ARRAY_BUFFER, vertexObject);
context.bufferData(context.ARRAY_BUFFER, new Float32Array(3 * 65536), context.STATIC_DRAW);
context.vertexAttribPointer(0, 3, context.FLOAT, false, 0, 0);
debug("Test large attribute buffer")
wtu.shouldGenerateGLError(context, context.NO_ERROR, "context.drawElements(context.TRIANGLES, 3, context.UNSIGNED_SHORT, 0)");
// Enlarge the attribute buffer slightly.
debug("Test even larger attribute buffer")
context.bufferData(context.ARRAY_BUFFER, new Float32Array(3 * 65536 + 3), context.STATIC_DRAW);
wtu.shouldGenerateGLError(context, context.NO_ERROR, "context.drawElements(context.TRIANGLES, 3, context.UNSIGNED_SHORT, 0)");
debug("")
var successfullyParsed = true;
</script>
<script src="../../js/js-test-post.js"></script>
</body>
</html>
|
